The overall objective of this project is to establish a better understanding of the
fate of manganese through water treatment and in the distribution system. A secondary
objective is to assess the quality of treated water blended with membrane treated filter
backwash water, simulating recycling. Even for utilities that meet the current secondary
maximum contaminant level (SMCL) of 0.05 mg/L for manganese, many continue to
report and experience discoloration from customers and from visible stains in the
distribution system. This study analyzed Mn occurrence in a case study at a surface water
utility in Dartmouth, Nova Scotia that uses chemical oxidation for Mn removal. Iron
and aluminum were examined as well, as they are relevant inorganic contaminants for
the utility. Treated water and water blended with membrane-treated backwash water were
oxidized by a secondary disinfectant (chlorine, chloramines, chlorine dioxide or no
disinfectant) and incubated for a 25-d period, simulating the time finished water might
spend in the distribution system. Includes 26 references, table.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 260 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 11/02/2003 |
